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  1. Suggestions for 5k5 40W iron?
  2. Peavey Classic 30 Reverb headscratcher...
  3. Schematic Tube Analog Output Stage???
  4. 300B 'direct drive' using a 6U8..
  5. Magnavox 88-02 power trans ratings?
  6. Preamp with humming noise!
  7. How to choose line out transformer?
  8. Tools for Cutting Tube Socket Holes?
  9. Switchable SE.
  10. GZ33 in place of 5U4 can it be done?
  11. phase splitter issue
  12. Armstrong A10 MK2 EL34 mono block
  13. "Ug" The Transformer
  14. i think its time i start playing with caps
  15. problems with preamp on home brew
  16. LS180 Tube Socket?
  17. simple question - 5V heater power supply
  18. Lineamp
  19. FI AUDİO 421 A
  20. Pete Millett has another Red Board for sale
  21. Jolida JD9 Problem
  22. 6N11 = 6N1P ?
  23. K12-G tube amp problem
  24. Please vote for one of the schematics.
  25. Advantages of separate PS for input and output stages
  26. Another PCB tube amp design
  27. Help. Replacement OPT sqrueeechhh.
  28. New concept of a power amp
  29. Lundahl and rectifier mismatch?
  30. Resurrecting weak tubes
  31. Best DHT heater?
  32. Help requested for EL84 SET amp
  33. What did I buy??
  34. Edcor and Custom Power Transformer Design
  35. What would you make with this power TX?
  36. Lundahl 1676
  37. DHT for 300B problem
  38. Newbie question about output transformer to speaker matching
  39. Red board add-on phono/RIAA pre-amp
  40. 2 Chassis amp
  41. Is It posible to bridge two quad II monoblocks?
  42. Power tube at work picture
  43. Tube SE power amp , which one??
  44. Hickok 539A issue
  45. Noise in one channel? Pioneer SX-400
  46. Hartung / Prestla OTL amps
  47. Lafayette Model 417
  48. Extreme plate load
  49. What do you think about this idea
  50. el84pse schem, need advice
  51. Video pentodes as outputs
  52. Custom Vibrolux Reverb noise issue
  53. Chinese "Audio Research" KT88s
  54. Fender bandmaster rectifire problem.
  55. New 6C33 Socket
  56. 2a3 PP output transformer
  57. PSU problem - Murphy is an ***hole!
  58. Best SET design?
  59. Anybody ever tried EBC41 as 12AX7 substitute?
  60. The 7242
  61. 12bh7a
  62. Phase Splitter Help
  63. Oscilloscope Question
  64. sizing opt
  65. 6P3C-E Datasheet help
  66. on the toroids again
  67. OPT problem or Something else 6L6 PP
  68. Look what I found!
  69. Help, Diy tube amp
  70. Idea
  71. a few DIY tube amplifier setups
  72. 6L6 PP amp motorboating
  73. Mayer-inspired 4P1L
  74. 6L6 WGB 2X34W STEREO AMPL
  75. Isolation transformation wiring project help
  76. Tube Amp DIY or Retail
  77. Supplier for GU50 tubes
  78. 2E26's
  79. Encel Stereophonic M.F.B CSM 40 amplifier
  80. Mono 300B SE Amplifier
  81. Broken tubes for 3D Modelling
  82. Loud hum in one channel
  83. 6EM7 PP question
  84. 12AU7/IRF610 Hybrid Amplifier
  85. 12AU7/IRF610 Hybrid Amplifier
  86. RIAA preamplifier
  87. Classic amp, Chinese or scratch-build for Quad ESL?
  88. CLASS A TUBE AMPLIFIER FOR TWEETER
  89. How to gap output transformers?
  90. Cathode bypasses - partial bypass and combination bias
  91. Phase splitter
  92. YS Audio balanced Preamp
  93. Low voltage 12AU7 (19J6) -- re "starving"
  94. phase splitter
  95. JTM30 output transformer
  96. Music Angel Meng 6P1
  97. Is it possible to dampen a partially microphonic 12ax7?
  98. Pioneer SA-810 tube amp.
  99. 6C33 D.C.M.B. - Paging Ari Polisois
  100. Whose is this logo?
  101. What is grid resistance of 807/6l6 in pentode
  102. PAS Upgrade Boards by Epperson
  103. Bang and Olufsen 609k stereo se el84 fm tuner
  104. Finished EL34 tube amp... but oscilates weird..
  105. Scope Trace
  106. Drifty tubes
  107. Choosing plate voltage
  108. Determining Zout for SRPP
  109. PX25 amplifier - thoughts?
  110. Testing Ck5703 tubes
  111. When can screen voltage be higher than plate???
  112. 31AL10's
  113. Lafayette TE-50 Tube Tester
  114. Acoustic (not Audio) Alchemy - I need a wizzard
  115. current feedback
  116. dac with tube buffer/preamp
  117. Sowter 3607
  118. Back to Loftin-White
  119. What to build? (I have a lot of parts)
  120. Grounding chassis through RCA
  121. K40Y-9: Questions And Comments
  122. buffer line stage schematic
  123. Dual triode Thanks for the pre-attenuation link
  124. Help With Alps Volume Pot Noise
  125. 6AM4 driving 45???
  126. Franks 6sn7 line stage question
  127. Edcor power tx XPWR035 issue
  128. Recommend me a schematic for El34 or KT88 ?
  129. RH84 Power supply
  130. Pentode driving a SE triode? any experience?
  131. Big tubes thread
  132. Meng Yayi KT88 MonoBlock
  133. Old Dumont Console - Story and Questions
  134. Newbie GlassWare Aikido All in One Questios
  135. Building my 1st tube amp
  136. A good tube for my SE 5K-8 OPT's
  137. 6c33 - ready, SET, GO
  138. Noisy tube rectifier goes quiet when i put my hand NEAR it
  139. Tweed 5E3 Deluxe Project Problems
  140. Strange ancient looking tube amp
  141. Vintage Dynaco vs. Triode Electronics
  142. LINE PRE - 6N9S - 6dB
  143. Can I balance a diff stage like this?
  144. Ways to design for low IM distortion
  145. Genalex KT88 Plate Dissipation Question
  146. difference between SE and PP transformer
  147. I put a bad ouput tube in my amp, did I hurt it?
  148. Vox AV 100 Mk2
  149. Stereo amplifyer project
  150. 6sl7 6sl7 dynaco driver board
  151. PCB for stand alone 5W SE
  152. Triode VS. UL bias
  153. How to test a DIY amp?
  154. Morgan Jones 4th ed
  155. How close is too close when designing an amp
  156. Fatman I tube Problem
  157. 807 p-p tube amp schematic
  158. TUBELAB SIMPLE SE
  159. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  160. Cheap motor caps(MKP) vs Electrolitics
  161. James O/P Tx
  162. Ripple reduction with added voltage compensation to HV
  163. SEVETLANA "SV" 6550 C vs 6550 C
  164. Frank's 6SN7 - plate follower, noise
  165. Help running RH807 at higher voltage
  166. Preamp hum issues
  167. EML mesh plate 2a3 in DRD amp
  168. How to run RH807 at 400V?
  169. Preamp Umbilical - Use Shield as Ground Lead?
  170. Automatic Bias Control sliding bias
  171. Edcor Output Transformer Resistance
  172. Would this be worthwile restoring?
  173. Historic Tube Amplifiers
  174. 6HF5 testing
  175. A quick question about NFB
  176. PAS3 - are the tone controls really *that* bad?
  177. PP OPT in SE mode operation?
  178. Cheap 6n6p double ended push-pull idea - thoughts?
  179. Vintage WE Tubes
  180. SE amplifier advice..
  181. Mineature Tubes
  182. MD SM 102b transformer spec's please
  183. Vintage Marconi radio
  184. second order harmonics
  185. Hybrid amplifier
  186. Input caps for Motorola Console Amps
  187. to much gain
  188. Question - Type 19 tube
  189. alternative for footswitch??
  190. Noob. Help PP EL34 / EF86 both as triode schem.
  191. Yet another LA-2A
  192. RH84 SE, pentode driver... advice please
  193. Having an issue with a MOSFET in my Blue Hawaii
  194. Info wanted on OPT....
  195. 6P43P Strange Plate Graphs
  196. Multiple Phono preamp
  197. pas filament supply
  198. HV on high voltage amps
  199. Lageschaar hybrid-connection PSE-KT66
  200. First DIY from scratch
  201. Ballance resistors
  202. casing about SOHA I headphone amp
  203. Any interest in 56 various tubes?
  204. Help with exploding tubes!
  205. My new filiment PS for Push Pull GM70
  206. So what exactly do I have here? Heathcraft EA-2
  207. Please help identify this Amveco toroidal transformer.
  208. first experience with retro electronics
  209. Revising a tube pre-amp: can't find parts?
  210. Info for Pioneer SA-810 tube amp
  211. Has anyone tried tx2575 in cathode resistor?
  212. 12JZ8
  213. Is it OK to drill mounting holes in transformer laminations?
  214. Seeking Sescom Transformer Specs
  215. Calibrating a Sencor ??
  216. Capacitor in parallel with negative feedback resistor
  217. Old electronics repair store closing. Hartford. FYI. Not related
  218. CL ad for tubes in MA. FYI only. Not connected
  219. Distortion in amp after warm up
  220. Re-bias when changing from Triod to Pentode
  221. Yaqin MC-10L - Electricity in volume knob
  222. Newbie question about a 300B amplifier
  223. Modified Wavebourn Tower II ?
  224. Elevated Heater Voltages - 40v?
  225. Free Tubes!
  226. found tube i like, only small bits of red letter,what tube brands used red lettering?
  227. Impedance problem Of O/P Transformer
  228. Runaway tubes or tubes drawing excess current--baffling
  229. croft SD3 CROFT PREAMP
  230. valve phono stage on a budget
  231. Dynaco vs. Dynaclone
  232. Amplifier Problem - Need help!
  233. Idea for a 6n1p preamp
  234. K & K Audio Two Terminal Constant Current Source
  235. 6550 Push Pull noise in power stage
  236. 6P1P-EV PP guitar amp tryout.
  237. question about output transformer for guitar amp
  238. Hammond B3 tech help needed. Distortion only on certain notes/drawbar frequencies.
  239. Counterpoint SA-12 wackyness
  240. Shuguang SG-50
  241. manley EQP-1A Tube EQ
  242. El34 PP advice needed
  243. Fosgate Punch 800 a4, diagram needed
  244. Power Transfomer For Valve Amp Question
  245. a 'simpler' tube/valve mixer topology
  246. Qustions about centre speaker connection
  247. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  248. 0d3 for el84 screen regulator
  249. Edcor XPWR059 power problem
  250. Did bootstrapping pot change it's operation

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